Refrigerating apparatus



Sept; 8, f 13.931. R. R. cANDoR 1,822,583

' REFRIGERATING APPARATUS Filed Feb. 27, 1930 2 Sheets-Sheet l @j INI/'gNToR Sept. 8, 1931. R. R. cANDoR REFRIGERATING APPARATUS Fled'Feb. 27, 1950 2 Sheets-Sheet 2 @mme Patented Sept. 8, 1931 UNITED STATES PATENT OFFICE ROBERT R. CANDOR, F DAYTON, 0HIO,A.SSIGNOR TO FRIGIDAIRE CORPORATION, OF DAYTON, OHIO, A. (JORIORATION OF DELAWARE BEFRIGEBATINQ APPARATUS Application ledebruary 27, 1930. Serial No. 431,760.

This invention relates to refrigerating apparatus and more particularly to an apparatus for cooling liquids, such as drinking water, beverages or the like.

An object of an apparatus for cooling liquids which apparatus is of relatively large cooling capacity.

Another object of this invention is to provide an apparatus having a storage and cooling receptacle adapted to contain a relatively large amount of cooled liquid to supply a sudden heavy demand, and which apparatus is provided with means for supplying liquid to said receptacle which liquid has been preliminarily coo ed before being introduced into said receptacle, the cooling action in said means beino sufficient -to prevent appreciable warming of:7 the liquid in the receptacle by the inowing liquid. v 20 Further objects and advantages of the resent invention will be apparent from the ollowing description, reference being had to the accompanying drawings, wherein a preferred form of the present invention is clearly shown.

In the drawings: s'

Fig. 1 is a vertical cross-sectional view, with certain portions shown diagrammatically, of an apparatus embodying features of this invention;

Fig. 2 is a horizontal cross-sectional view taken along the line 2-2 of Fig. 1;

Fig. 3 is a front elevation of an apparatus, suchas shown in Figs. 1 and 2;

Fig. Il is an enlarged cross-sectional view of a portion of the apparatus shown in Figs. 1, 2and3;and

Fig. 5 is a vertical view, partly in section nd partly in elevation, of a slightly modied '0 orm. v

An apparatus embodying features of this \invention may comprise in general a liquid container provided with means 21 for cooling, and maintaining cold, a body of liquid within the container 20 and it may this invention is to provide also'include means 22 for introducing liquid into the container 20, preferably in a precooled or partially cooled condition, the cooling action ink means 22 being suliicient to prevent appreciable warming of the liquid in the container 20 by the iniowing liquid.'

Preferably the liquid container 20 is av metal walled cylindrical container. The

crant passage foi-nung meanssuch as a pipe, or pipes, spirally arranged around the container in thermal contact with the wall. The thermal contact may be enhanced, for instance, by soldering or welding as shown at 23. 'lhe means 22 for introducing liquid into the container 20 preferably is a liquid supply passage forming means such as a pipe also spirally arranged around the container 20 and in thermal contact therewith. The thermal contact in this case may also be enhanced by welding or soldering as indicated at. 23. Means for withdrawing the liquid from the containerm20 may also be provided, and preferably this may be accomplished by providing a faucet 24: connected to the lower end of the container 20.

In the modification shown in Figs. 1 to 4 inclusive the refrigerant pipe 21 may be provided with means for maintaining the pipe .21 filled with liquid refrigerant.' ,This may be accomplished by` providing a header 25 to which one or more pipes 21 are connected so that liquidrefrigerant inthe header 25 iows and fills the pipe or pipes 21. As specifically shown there is a single pipe with one or both of its ends 26 and 27 connected to the boiler 25 below the level of the liquid. The pipe is wound around the container 20 and looped at 28 in a reverse bend in order that both ends 26 and 27 may be connected tol the header 25. The 'header 25 may be provided with a valve 29 controlled by the float 30 `in such'a manner as to maintain a 1eve1`31 of liquid within the-container 20. Evaporated refrigerant may leave through a means 2l for cooling preferably is a refrignected to cludes a l tion of which funnel-shaped fitting 32 guarded, if preferred, by a baffle plate 33. Further details of the structure of the header 25 are disclosed in the patent to R. G. Osborn, No.

1,556,708, patented October 13, 1925.

refrigerant liquefying unit may be c0n the header 25. Preferably this incompressor 34 delivering compressed refrigerant to a condenser 35 from which the condensed refrigerant is collected in a liquid refrigerant receiver 86. From thence the liquid refrigerant is delivered by means of a pipe 37 to a fitting connected to the valve 29 so that the entrance of liquid refrigerant into the header 25 is controlled by the valve 29. Thel evaporated refrigerant leaving throughthe funnel-shaped fitting 32 returns by means of the pipe 38 to the compressor 34. Means may be provided for maintaining desired temperature conditions within the apparatus. Preferably this is accomplished by maintaining the liquid refrigerant in the 'header 25 at a substantially constant temperature by providing ay control for the motor 39. This control may include a bellows 4() connected to the snap switch 4l which starts and stops the motor 39. The bellows 40 is connected to the pipe 38 so that the\motor 39 starts and stops in accordance with ypressure-temperature conditions in the header 25. Temperatures are maintained such that freezing-of the liquid in the pipe 2l is avoided.

Liquid flows through pipe 22 and is partially cooled before being delivered through the fitting 41 into the container 20 preferably at the upper portion of the container 20. Thus the liquid delivered to the con tainer 20 is partially cooled Yand there is no danger of substantially uncooled liquid being delivered to the faucet 24. J

Insulation may be provided for the refrig erated parts of the apparatus. Thus a cabinet may be placed around the container 20 together with the header 25 and the associated pipes. The cabinet may include relatively self-sustaining insulation 50 and relatively loose insulation 51 placed around the container pipes and header. If desired, the refrigerant liquefying unit may be placed in the lower portion of the cabinet `below the' container 20.

l the modification shown in Fig. 5, the con/tainer 20a may have a refrigerant pipe 21a spirally wound around it. The liquid supply pipe 22a may also be wound around the container 20a. In this case the refrigerant is expanded by an automatic expansion valve which automatically maintains a predetermined pressure within the pipe 21a. The refrigerant liquefying unit may be automatically controlled by a thermostat, a pormay include the thermostatic bulb 61 placed, for instance, in the container 60. The expanded refrigerant thus flows downwardly through the spiral pipe 21a and the liquid to be cooled flows upwardly in the spiral pipe 22a. Other portions of the apparatus may be substantially as shown or described with respect to Figs. 1 to 4 inclusive.

While the form of embodiment of the invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. A liquid cooling apparatus comprising a metal walled liquid container, a liquid supply means for said container forming a passage spirally arranged around said container in thermal contact with said Wall and connected to said container at its upper portion, means forming a refrigerant passage spirally arranged around said container in thermal contact` with said wall and interposed between loops of said liquid supply means, and means for withdrawing liquid from said container at its lower portion.

2. A liquid cooling apparatus comprising a metal walled liquid container, a liquid supply means for said container forming a passage spirally arranged around said container in thermal contact with said wall and connected to said container at its upper portion, means forming a refrigerant passage spirally arranged around said container in thermal contact with said wall and interposed between loops of said liquid supply means, insulation around both said means and means for withdrawing liquid from said container at its lower portion.

3,. A liquid cooling apparatus comprising a metal walled cylindrical liquid container, a liquid supply means for said container forming a passage spirally arranged around said container in thermal contact with said wall and connected to said container at its upper portion, means forming a refrigerant passage spirally arranged around said container in thermal contact with said wall and interposed between loops of said liquid supply means, and means for withdrawing liquid from said containery at its lower portion. 4. A liquid cooling apparatus comprising a metal walled cylindrical liquid container, a liquid supply means for said container forming a passage spirally arranged around said container in thermal contact with said wall and connected to said container at itsV upper portion, means forming a refrigerant passage spirally arranged around said container in thermal contact with said lwall and interposed between loops of said liquid supply means insulation around both said means andvmeansfor withdrawing liquid from said container at its lower portion.

5. A liquid cooling apparatus comprising a metal walled liquid container, a liquid Ill) supply means Jfor said container forming a passage spirrlly arranged around said container in thermal contact with said wall and connected to said container, means forming a refrigerantv passage spirallyk arranged A around said container in thermal contact with said wall and interposed between loops 1 of said liquid supply means, and means for withdrawmg liquid from said container at its lower portion.

In testimony whereof I hereto ax my signature.

ROBERTA R.- CANDOR. 

